1,2-萘醌-4-磺酸钠分光光度法测定间苯二酚  

Spectrophotometric determination of resorcinol by using sodium 1,2-naphthoquinone-4-sulfonate as chromogenic reagent

作　　者：王世雷[1,2] 李晶[1] 张欢欢[1] 李全民[1] 

机构地区：[1]河南师范大学化学与环境科学学院河南省环境污染控制重点实验室,新乡453007 [2]焦作师专化学系,焦作454000

出　　处：《分析试验室》2009年第8期36-39,共4页Chinese Journal of Analysis Laboratory

基　　金：河南省教育厅自然科学基金(2008B150011)项目资助

摘　　要：在pH13．00缓冲溶液中，间苯二酚能够催化氢氧根离子与1，2-萘醌-4-磺酸钠反应生成2-羟基-1，4-萘醌，其最大吸收波长为454nm。间苯二酚质量浓度在0．39—13．21mg/L范围内与吸光度呈现良好线性关系。线性回归方程为A=0．01918＋0．05703c（×10^5 mol／L），相关系数r=0．9981。RSD和检测限分别为1．6％，0．34mg／L（3σ／k）。该法能够直接用于水样中间苯二酚含量测定，回收率在94．3％-106％。A novel method for the determination of resorcinol with 1,2-naphthoquinone-4-sulfonate （NQS） by spectrophotometry was proposed in this paper. The study indicated that 2-hydroxy-1, 4-naphthoquinone （lawsone） was formed by hydroxyl ion and NQS in a buffer solution of pH 13.00 using resorcinol as a catalyzer, and s was 5.7 × 10^3 L/tool. cm at 454 nm. Absorbency is linear with the concentration of resorcinol in the range of 0.39 - 13.21 mg/L. The lincar equation is A = 0.01918 ＋ 0.05703c （ × 10^5 mol/L）, with a linear correlation coefficient of 0.9981. The recoveries are 94.3% - 106%. The detection limit is 0.34 mg/L （3σ/k） and RSD is 1.6%. The method has been sucessfully used for the determination of resorcinol in water.

关 键 词：间苯二酚 1 2-萘醌-4-磺酸钠 分光光度法 

分 类 号：O657.3[理学—分析化学]